The open feature request is listed as an enhancement which is a bit of a misnomer, but feel free to add your voice and vote on the Google Plus Platform list if you agree.

Throwing my support behind a non-JS solution for accessibility and speed.

A simple, elegant GET request based system would be wonderful, I already use it for Twitter and Delicious, should be trivial for Google engineers to implement.

Of course, it's intuitively obvious why an advertising company doesn't want a JavaScript alternative, but we can still dream. I'd implement it in a heartbeat here if they did.